Short answer: the Harman Kardon Luna if sound quality matters most, the Doss E-Go II if price matters most. The Harman Kardon Luna ranks #24 of 150 medium speakers, rated 4.0/5, at $290.99. The Doss E-Go II ranks #124, rated 2.5/5, at $39.90, $251.09 cheaper.
What the Harman Kardon Luna does well: Harman Kardon Luna uses 48mm x 90mm woofer, 20mm tweeter. Watch for: Bass is limited by its 57Hz specification.
The case for the Doss E-Go II: Very portable (water bottle sized), truly waterproof (IPX6), 12-hour battery life, excellent value for money, fast Bluetooth pairing. The catch: Horribly bad unless turned up, still not great.
Buy the Harman Kardon Luna when sound quality outweighs the price for you, and the Doss E-Go II when the price outweighs sound quality instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Harman Kardon Luna | Doss E-Go II | |
|---|---|---|
| Price | $290.99 | $39.90 |
| Ranked | #24 of 150 in Medium Size Portable Bluetooth Speakers | #124 of 150 in Medium Size Portable Bluetooth Speakers |
| App | No | No |
| Aux Input | No | Yes |
| Bass Extension (-10dB) | 57Hz | 120Hz |
| Battery Life | 12 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| EQ | No | No |
| IP Rating | IP67 | IPX6 |
| MicroSD Playback | No | Yes |
| Power Input | USB-C | Micro USB |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| TWS | Yes | No |
| USB Playback | Yes | - |
| Weight | 2.5 lbs (1.13 kg) | 0.9 lbs (399 g) |
| Bluetooth Version | 5.3 | 4.1 |
| Dimensions | 8.3” x 3.1” x 3.1” (210 x 78 x 80 mm) | 7.8” x 2.5” x 2” (198 x 63 x 51 mm) |
| Drivers | 48mm x 90mm woofer, 20mm tweeter | 2x 6W full-range drivers + 1x passive radiator |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 40W | 12W |
| Digital Aux Input | No | No |
| Built-in Microphone | - | Yes |
| Strap | - | Yes (strap) |
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Prices on this page were last checked September 30, 2026 at 2:57 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
Harman Kardon Luna: $290.99 Amazon eBay
Newer model: the Harman Kardon Luna 2, ranked higher, rated 4.1/5.
Pros: Harman Kardon Luna uses 48mm x 90mm woofer, 20mm tweeter. Its 1.13 kg, claimed 12 hours (Manufacturer specified) battery life, IP67 protection and mono playback make it a practical option for its intended room or portable use. The sound is fairly balanced apart from the boosted bass. Measured bass extension of 57Hz (-10dB).
Cons: Bass is limited by its 57Hz specification. There is no companion app. No EQ adjustment. Boosted bass, and less detailed than higher-ranked speakers.
Full Harman Kardon Luna review and specifications →
| Amplifier Power | 40W |
|---|---|
| App | No |
| Aux Input | No |
| Bass Extension (-10dB) | 57Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Dimensions | 8.3” x 3.1” x 3.1” (210 x 78 x 80 mm) |
| Drivers | 48mm x 90mm woofer, 20mm tweeter |
| EQ | No |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| MicroSD Playback | No |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 2.5 lbs (1.13 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Harman Kardon Luna vs Harman Kardon Luna 2
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Doss E-Go II: $39.90 Amazon eBay
Pros: Very portable (water bottle sized), truly waterproof (IPX6), 12-hour battery life, excellent value for money, fast Bluetooth pairing. Measured bass extension of 120Hz (-10dB).
Cons: Horribly bad unless turned up, still not great
Full Doss E-Go II review and specifications →
| Amplifier Power | 12W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 120Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 4.1 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 7.8” x 2.5” x 2” (198 x 63 x 51 mm) |
| Drivers | 2x 6W full-range drivers + 1x passive radiator |
| EQ | No |
| IP Rating | IPX6 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Power Input | Micro USB |
| Stereo | Yes |
| Strap | Yes (strap) |
| TWS | No |
| Weight | 0.9 lbs (399 g) |
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
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